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    Question

    The ratio of two numbers is 7 : 5, and their HCF is 6.

    What is their LCM?
    A 252 Correct Answer Incorrect Answer
    B 185 Correct Answer Incorrect Answer
    C 210 Correct Answer Incorrect Answer
    D 122 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ;
    Let the numbers be 7x and 5x.

    Since the HCF of 7x and 5x is 6, we get x = 6.

    So, the numbers are 42 and 30.

    Hence, LCM of 42 and 30 = 210.

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